Remotely excited Raman optical activity using chiral plasmon propagation in Ag nanowires

Mengtao Sun; Zhenglong Zhang; Peijie Wang; Qiang Li; Fengcai Ma; Hongxing Xu

doi:10.1038/lsa.2013.68

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Remotely excited Raman optical activity using chiral plasmon propagation in Ag nanowires

Original Articles

- Remotely excited Raman optical activity using chiral plasmon propagation in Ag nanowires
- Remotely excited Raman optical activity using chiral plasmon propagation in Ag nanowires
- LSA 2013年2卷第3-4期
- Affiliations：
  
  1.Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
  2.Department of Physics, Capital Normal University, Beijing 100048, China
  3.Department of Physics, Liaoning University, Shenyang 110036, China
- Author bio：
  
  Professor MT Sun, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, PO Box 603-146, Beijing 100190, China E-mail: mtsun@iphy.ac.cn
- Funds：
- DOI：10.1038/lsa.2013.68
  中图分类号：
- 纸质出版日期：2013-12，
  
  网络出版日期：2013-11-22，
  
  收稿日期：2013-03-22，
  
  修回日期：2013-07-20，
  
  录用日期：2013-07-23
- Accepted：
Scan QR Code
Remotely excited Raman optical activity using chiral plasmon propagation in Ag nanowires[J]. LSA, 2013,2(3-4).

Sun, M. T. et al. Remotely excited Raman optical activity using chiral plasmon propagation in Ag nanowires. Light: Science & Applications, 2, e112 (2013).
Remotely excited Raman optical activity using chiral plasmon propagation in Ag nanowires[J]. LSA, 2013,2(3-4). DOI： 10.1038/lsa.2013.68.

Sun, M. T. et al. Remotely excited Raman optical activity using chiral plasmon propagation in Ag nanowires. Light: Science & Applications, 2, e112 (2013). DOI： 10.1038/lsa.2013.68.

摘要

Abstract

We experimentally investigated remotely excited Raman optical activity (ROA) using propagating surface plasmons in chiral Ag nanowires. Using chiral fmoc-glycyl-glycine-OH (FGGO) molecules

we first studied the local surface plasmon-enhanced ROA. We found that the Raman intensity can be excited by left- and right-circularly polarized lights and that the circular intensity difference (CID) can be significantly enhanced. Second

by selecting vibrational modes with large Raman and ROA intensities that are not influenced by chemical enhancements

we studied remotely excited ROA imaging and the CID of FGGO molecules by propagating a plasmonic waveguide using Ag chiral nanostructures. When laser light was radiated on one of the Ag terminals

the measured CID of the FGG at the other terminal showed little change compared to the local excited CID. Meanwhile

when the laser light was radiated on the Ag nanowires (not on the terminals) and was coupled to the nearby nanoantenna

the CID of the ROA could be manipulated by altering the coupling angle between the Ag nanowires. To directly demonstrate the propagation of ROA along the nanowire and its remote detection

we also measured the remotely excited ROA spectra. Our experimental method has the potential to remotely determine the chirality of molecular structures and the absolute configuration or conformation of a chiral live cell.

关键词

Keywords

Ag nanowireschiral plasmonsplasmon propagationRaman optical activityremote excitation

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